| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Method and system for transmission or reception of FM signals utilizing a DDFS clocked by an RFID PLL | US13080036 | 2011-04-05 | US08437706B2 | 2013-05-07 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for transmission or reception of signals utilizing a DDFS clocked are provided. A first oscillator signal utilized for transmission and/or reception of signals of a first wireless communication protocol may be generated, and a direct digital frequency synthesizer (DDFS) may be clocked by the first oscillator signal to generate one or more second oscillator signals. The one or more second oscillator signals may be modulated to generate a signal adhering to a second wireless communication protocol. The one or more second oscillator signals may be utilized to demodulate signals of the second wireless communication protocol. A control word input to the DDFS may control a frequency of the one or more second oscillator signals generated by the DDFS. Simultaneous transmission and reception of signals of the second wireless communication protocol may be simulated by switching the control word input to the DDFS between two values. | ||||||
| 182 | Apparatus and method for low noise amplification | US13528222 | 2012-06-20 | US08436684B2 | 2013-05-07 | Jonne Juhani Riekki; Jari Johannes Heikkinen; Jouni Kristian Kaukovuori |
| Embodiments provide an amplifier and a method for using and manufacturing said amplifier that incorporate an impedance matching stage, a feedback circuit, and a gain stage. The impedance matching stage is coupled to the feedback circuit wherein the feedback circuit provides a compensated second bias voltage for the impedance matching stage. The output of the impedance matching stage is used to set an input bias voltage for both the impedance matching stage and the gain stage. The output of the impedance matching stage is also used, together with the output of the gain stage, to produce an output of the amplifier. A signal reuse stage may be provided between the output of the impedance matching stage and the output of the amplifier. | ||||||
| 183 | Amplifier | US13271705 | 2011-10-12 | US20120293259A1 | 2012-11-22 | Jonne Juhani RIEKKI; Jari Johannes Heikkinen; Jouni Kristian Kaukovuori |
| A configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit includes a degeneration inductance stage whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit includes a common-gate low noise amplifier stage whereby the low noise amplifier circuit operates as a common-gate low noise amplifier. The second topology includes one or more internal input impedance matching components and the first topology does not include the one or more internal input impedance matching components. | ||||||
| 184 | Method and System for Clocking FM Transmit, FM Receive, and Near Field Communication Functions Using DDFS | US13206240 | 2011-08-09 | US20110294419A1 | 2011-12-01 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Methods and systems for clocking FM transmit, FM receive and near field communication functions using DDFS are disclosed. Aspects of one method may include generating a Bluetooth signal that may comprise, for example, I and Q components, or Bluetooth local oscillator (LO) signals, for use in Bluetooth communication. One of the two Bluetooth LO signals may then be used by a DDFS to generate I and Q LO signals for FM reception and/or transmission. One of the I and Q LO signals for FM communication may be used by another DDFS to generate at least one LO signal for near field communication (NFC) transmission and/or reception. While the Bluetooth LO signal may vary in frequency as Bluetooth frequency hopping occurs, the FM LO signals may remain constant for a specific channel frequency. Similarly, while the FM LO signals may be changed to tune to different FM channels, the NFC LO signals may remain at a constant frequency. | ||||||
| 185 | Method and system for using a bluetooth PLL to drive FM transmit, FM receive, bluetooth, and NFC functions | US11754768 | 2007-05-29 | US08032175B2 | 2011-10-04 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for using a Bluetooth® PLL/LO to drive FM Transmit, FM Receive, Bluetooth, and NFC functions. A Bluetooth® PLL/LO may be utilized to generate Bluetooth® signal that comprise I and Q components for use in Bluetooth® communication. The Bluetooth® signals may then be utilized by a DDFS to generate FM radio I and Q signals for FM radio reception and/or transmission. The Bluetooth® signals may also be utilized by a second DDFS to generate signals for near field communication (NFC) transmission and/or reception. The Bluetooth® signals may be kept at the same frequency, or reduced in frequency, for use in clocking the DDFS. A frequency word may also be utilized to clock the DDFS. The outputs of each DDFS may be a constant frequency while the inputs to each DDFS may vary in frequency. | ||||||
| 186 | Method and system for using a transformer for FM transmit and FM receive functionally | US12536059 | 2009-08-05 | US08018393B2 | 2011-09-13 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for using a transformer for FM transmit and FM receive functionality may include communicating data-bearing signals via primary windings of a transformer, wherein secondary windings of the transformer may be utilized for receiving and/or transmitting the communicated data-bearing signals, wherein the secondary windings may be utilized as a load for the transmitting. The secondary windings and/or a power amplifier may be biased for the transmitting by applying an electrical signal at a terminal of the secondary windings, wherein the electrical signal that may be applied at the center terminal may be a biasing voltage. The receiving and the transmitting may be operated in time division duplex mode, or simultaneously. DC signal components for the receiving may be blocked by using a plurality of capacitors. | ||||||
| 187 | Method and system for clocking FM transmit FM receive, and near field communication functions using DDFS | US11754705 | 2007-05-29 | US07995971B2 | 2011-08-09 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Methods and systems for clocking FM transmit, FM receive and near field communication functions using DDFS are disclosed. Aspects of one method may include generating a Bluetooth signal that may comprise, for example, I and Q components, or Bluetooth local oscillator (LO) signals, for use in Bluetooth communication. One of the two Bluetooth LO signals may then be used by a DDFS to generate I and Q LO signals for FM reception and/or transmission. One of the I and Q LO signals for FM communication may be used by another DDFS to generate at least one LO signal for near field communication (NFC) transmission and/or reception. While the Bluetooth LO signal may vary in frequency as Bluetooth frequency hopping occurs, the FM LO signals may remain constant for a specific channel frequency. Similarly, while the FM LO signals may be changed to tune to different FM channels, the NFC LO signals may remain at a constant frequency. | ||||||
| 188 | Switched-capacitor amplifier arrangement having a low input current | US12240274 | 2008-09-29 | US07944288B2 | 2011-05-17 | Detlef Ummelmann |
| An SC amplifier arrangement and a method for measuring an input voltage are described. | ||||||
| 189 | Method and system for mitigating receiver saturation during simultaneous FM transmission and reception | US11752754 | 2007-05-23 | US07933568B2 | 2011-04-26 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for mitigating receiver saturation during simultaneous FM transmission and reception may include detecting a power of an RF signal received at an antenna. A power of one or more baseband signal components corresponding to the RF signal may be determined. A power of signals transmitted via the antenna may be controlled, based on a cost function derived from at least the detected RF signal power received and/or the determined power of the one or more baseband signal components. One or more of the baseband signal components may be an in-phase signal, a quadrature signal or both an in-phase signal and a quadrature signal associated with a same carrier frequency. In one embodiment of the invention, the radio frequency signal may be an intermediate frequency (IF) radio signal. | ||||||
| 190 | METHOD AND SYSTEM FOR FM TRANSMIT AND FM RECEIVE USING A TRANSFORMER AS A DUPLEXER | US12910167 | 2010-10-22 | US20110037677A1 | 2011-02-17 | Ahmadreza Rofougaran; Maryam Rofougaran |
| A method for processing communication signals is disclosed and may include communicating radio frequency signals via an antenna coupled to primary windings of a radio frequency transformer. Secondary windings of the radio frequency transformer may be utilized for receiving and/or transmitting the communicated radio frequency signals. The receiving and the transmitting may operate in time division duplex mode. A number of windings between a pair of connector terminals of the secondary windings used for the transmitting of the radio frequency signals, may be less than or equal to a number of windings of the primary windings. A number of windings between a pair of connector terminals of the secondary windings used for the receiving of the radio frequency signals, may be greater than or equal to a number of windings of the primary windings. | ||||||
| 191 | Method and system for simultaneous FM transmit and FM receive functions using an integrated bluetooth local oscillator generator (LOGEN) | US11754708 | 2007-05-29 | US07885683B2 | 2011-02-08 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for enabling simultaneous FM transmitter and FM receiver functions using an integrated Bluetooth Local Oscillator Generator (LOGEN). A Bluetooth® LOGEN may be utilized to generate Bluetooth® signal that comprise (I) and (Q) components for use in Bluetooth® communication. The Bluetooth® LOGEN may then be utilized by a DDFS to generate FM radio (I) and (Q) signals for FM radio reception. The Bluetooth® LOGEN may also be utilized by a second DDFS to generate FM radio (I) and (Q) signals for FM radio reception. The Bluetooth® signals may be kept at the same frequency, or reduced in frequency, for use in clocking the DDFS. A frequency word may also be utilized to clock the two DDFS. The outputs of each DDFS may be a constant frequency while the inputs to each DDFS may vary in frequency. | ||||||
| 192 | Variable gain amplifier | US12387826 | 2009-05-06 | US20100283543A1 | 2010-11-11 | Krishna Shivaram; Kashif A. Ahmed |
| Various amplifier configurations having increased bandwidth, linearity, dynamic range, and less distortion are shown and disclosed. To increase bandwidth in a transimpedance amplifier, a replica circuit is created to replicate a degeneration resistance, or the resistance or value that relates to a feedback resistance. From the replica circuit, the replicated values are mirrored and processed to control a FET switch which modifies a degeneration resistance. The FET switch control signal is related to the feedback resistance and modifies the degeneration resistance to thereby maintain the product of the feedback resistance and the degeneration resistance as a constant. In another embodiment, a second switch controlled by an automatic gain control signal is established between a first stage amplifier and a second stage amplifier to improve dynamic range and bandwidth without degrading other amplifier specifications. | ||||||
| 193 | Linear transimpedance amplifier with wide dynamic range for high rate applications | US12387824 | 2009-05-06 | US20100283542A1 | 2010-11-11 | Krishna Shivaram; Kashif A. Ahmed |
| Various amplifier configurations having increased bandwidth, linearity, dynamic range, and less distortion are shown and disclosed. To increase bandwidth in a transimpedance amplifier, a replica circuit is created to replicate a degeneration resistance, or the resistance or value that relates to a feedback resistance. From the replica circuit, the replicated values are mirrored and processed to control a FET switch which modifies a degeneration resistance. The FET switch control signal is related to the feedback resistance and modifies the degeneration resistance to thereby maintain the product of the feedback resistance and the degeneration resistance as a constant. In another embodiment, a second switch controlled by an automatic gain control signal is established between a first stage amplifier and a second stage amplifier to improve dynamic range and bandwidth without degrading other amplifier specifications. | ||||||
| 194 | Method and system for equalizing antenna circuit matching variations | US11750095 | 2007-05-17 | US07825871B2 | 2010-11-02 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for equalizing antenna circuit matching variations may include adjusting a frequency response of an antenna via a programmable filter and a gain of the antenna by varying a programmable amplifier. The antenna frequency response and the antenna gain may be adjusted dynamically and/or autonomously. The programmable amplifier and the programmable filter may be adjusted sequentially or simultaneously. The programmable filter may be an LC-type circuit and the programmable amplifier may be a low-noise amplifier. In an exemplary embodiment of the invention, the programmable filter may comprise a programmable capacitance in a matrix arrangement and/or a programmable inductance in a matrix arrangement. | ||||||
| 195 | Switched-capacitor amplifier arrangement having a low input current | US12240274 | 2008-09-29 | US20100079204A1 | 2010-04-01 | Detlef Ummelmann |
| An SC amplifier arrangement and a method for measuring an input voltage are described. | ||||||
| 196 | Method and system for gain control and power saving in broadband feedback low-noise amplifiers | US11752025 | 2007-05-22 | US07564302B2 | 2009-07-21 | Alireza Zolfaghari |
| Methods and systems for gain control and power saving in broadband feedback low-noise amplifiers are disclosed and may include controlling gain, power and/or a noise figure by selectively enabling one or more of a plurality of gain stages by activating one or more of a plurality of pairs of switching transistors. Each of the gain stages may comprise complementary inverter pairs, with the gain of each of the gain stages binary weighted and stored in a lookup table. A feedback resistance coupled across the gain stages may be adjusted, and may comprise a plurality of individually addressable resistors, with the resistance binary weighted and stored in a lookup table. The adjusting of the feedback resistance may comprise switching one or more of a plurality of switching transistors, each connected in parallel with one of the individually addressable resistors, which may shunt one or more of the individually addressable resistors. | ||||||
| 197 | METHOD AND SYSTEM FOR MITIGATING RECEIVER SATURATION DURING SIMULTANEOUS FM TRANSMISSION AND RECEPTION | US11752754 | 2007-05-23 | US20080233910A1 | 2008-09-25 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for mitigating receiver saturation during simultaneous FM transmission and reception may include detecting a power of an RF signal received at an antenna. A power of one or more baseband signal components corresponding to the RF signal may be determined. A power of signals transmitted via the antenna may be controlled, based on a cost function derived from at least the detected RF signal power received and/or the determined power of the one or more baseband signal components. One or more of the baseband signal components may be an in-phase signal, a quadrature signal or both an in-phase signal and a quadrature signal associated with a same carrier frequency. In one embodiment of the invention, the radio frequency signal may be an intermediate frequency (IF) radio signal. | ||||||
| 198 | Method And System For Wireless Communication Using Integrated Clock Generation For Bluetooth And FM Transmit And FM Receive Functions | US11754481 | 2007-05-29 | US20080233891A1 | 2008-09-25 | Ahmadreza Rofougaran; Maryam Rofougaran |
| A method and system for wireless communication using integrated clock generation for Bluetooth and FM transmit and FM receive functions may include generating a clock signal to enable transmission and/or reception of Bluetooth signals; and clocking a Direct Digital Frequency Synthesizer (DDFS) via the generated clock signal to generate one or more signals by the DDFS that enable transmission or reception of FM signals. The generated clock signals for the Bluetooth and for the FM transmit and receive functions may include an in phase and quadrature phase component. Time Division Duplex of FM transmission and reception and simultaneous FM transmission and FM reception may be simulated by switching the control frequency word at a certain rate. The DDFS may also receive control words to compensate for frequency changes in the Bluetooth LO. The FM signals reception and transmission may be controlled by a bi-directional coupler. | ||||||
| 199 | METHOD AND SYSTEM FOR SHARING A SINGLE ANTENNA FOR FREQUENCY MODULATION (FM) TRANSMISSION, FM RECEPTION AND NEAR FIELD COMMUNICATION (NFC) | US11753698 | 2007-05-25 | US20080233880A1 | 2008-09-25 | Ahmadreza Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for sharing a single antenna for frequency modulation (FM) transmission, FM reception and near field communication (NFC) are presented. Aspects of a system may include at least one circuit that enables, via a single antenna, simultaneous transmission of an FM signal and reception of an FM signal, and transmission of an NFC signal or reception of an NFC signal. | ||||||
| 200 | METHOD AND SYSTEM FOR USING A BLUETOOTH PLL TO DRIVE FM TRANSMIT, FM RECEIVE, BLUETOOTH, AND NFC FUNCTIONS | US11754768 | 2007-05-29 | US20080233874A1 | 2008-09-25 | Ahmadreza (Reza) Rofougaran; Maryam Rofougaran |
| Aspects of a method and system for using a Bluetooth® PLL/LO to drive FM Transmit, FM Receive, Bluetooth, and NFC functions. A Bluetooth® PLL/LO may be utilized to generate Bluetooth® signal that comprise I and Q components for use in Bluetooth® communication. The Bluetooth® signals may then be utilized by a DDFS to generate FM radio I and Q signals for FM radio reception and/or transmission. The Bluetooth® signals may also be utilized by a second DDFS to generate signals for near field communication (NFC) transmission and/or reception. The Bluetooth® signals may be kept at the same frequency, or reduced in frequency, for use in clocking the DDFS. A frequency word may also be utilized to clock the DDFS. The outputs of each DDFS may be a constant frequency while the inputs to each DDFS may vary in frequency. | ||||||
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